Remove an option starting an uppercase character so that the test does not depends on sort order.

git-svn-id: https://llvm.org/svn/llvm-project/lld/trunk@189423 91177308-0d34-0410-b5e6-96231b3b80d8
[PECOFF] Make command line options case insensitive to match link.exe's behavior.

git-svn-id: https://llvm.org/svn/llvm-project/lld/trunk@189505 91177308-0d34-0410-b5e6-96231b3b80d8